reactive redis serialization issue. Cannot serialize value of type class java.lang.Integer without a serializer error generated when saving in redis

I am trying to store an object in redis and I am getting this error. reactor.core.Exceptions$ErrorCallbackNotImplemented: java.lang.IllegalStateException: Cannot serialize value of type class java.lang.Integer without a serializerI have included serializers for both value and hashvalue but it doesnt work. below is my code

config

    public ReactiveRedisOperations<String, Player> playerRedisOperations(LettuceConnectionFactory connectionFactory) {        RedisSerializationContext<String, Player> serializationContext = RedisSerializationContext                .<String, Player>newSerializationContext(new StringRedisSerializer())                .key(new StringRedisSerializer())                .value(new GenericToStringSerializer<>(Player.class))                .hashKey(new StringRedisSerializer())                .hashValue(new GenericJackson2JsonRedisSerializer())                .build();        return new ReactiveRedisTemplate<>(connectionFactory, serializationContext);    }

redis repository

    private final ReactiveRedisOperations<String, Player> redisOperations;    private final ReactiveHashOperations<String, Integer, Player> hashOperations;    public PlayerRedisRepositoryImpl(@Qualifier("playerRedisOperations")ReactiveRedisOperations<String, Player> redisOperations) {        this.redisOperations = redisOperations;        this.hashOperations = redisOperations.opsForHash();    }    public Mono<Player> savePlayer(String key,Player player) {        return hashOperations.put(key, player.user_id(), player).map(isSaved -> player);    }

stacktrace

reactor.core.Exceptions$ErrorCallbackNotImplemented: java.lang.IllegalStateException: Cannot serialize value of type class java.lang.Integer without a serializerCaused by: java.lang.IllegalStateException: Cannot serialize value of type class java.lang.Integer without a serializer    at org.springframework.data.redis.serializer.DefaultRedisElementWriter.write(DefaultRedisElementWriter.java:56)    at org.springframework.data.redis.serializer.RedisSerializationContext$SerializationPair.write(RedisSerializationContext.java:287)    at org.springframework.data.redis.core.DefaultReactiveHashOperations.rawHashKey(DefaultReactiveHashOperations.java:339)    at org.springframework.data.redis.core.DefaultReactiveHashOperations.lambda$put$20(DefaultReactiveHashOperations.java:251)    at org.springframework.data.redis.core.DefaultReactiveHashOperations.lambda$createMono$27(DefaultReactiveHashOperations.java:324)    at org.springframework.data.redis.core.ReactiveRedisTemplate.lambda$doInConnection$1(ReactiveRedisTemplate.java:244)    at reactor.core.publisher.FluxUsingWhen.deriveFluxFromResource(FluxUsingWhen.java:119)

what could be the issue?